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| All Patents in class 415/118 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 225,963 | Mar. 30, 1880 | C.H. Bacon | Water-meter | |
| 1,986,915 | Jan. 08, 1935 | G.A. Biggs | Hydraulic Turbine | ||
| 2,733,682 | Feb. 07, 1956 | R.R. Langteau | Pump Shaft Indexing Means | ||